You are looking at a good used Flat Top L33 Piston with a Full Floating Wrist Pin out of a 2005 GMC Sierra.
This is good shape.
This listing is for 1 piston & connecting rod only.
Be Aware that some 2005 Model Engines came with Pressed in Wrist Pins, there is really no way to tell what you have until you look.
This came on:
2005+ LR4, LY2, & L20 4.8 Engines
2005 2006 2007 L33 5.3 Engines
2007+ LH6, LY5, LMG, LC9, LH8, & LS4 5.3 Engines
Free shipping is Continental US Only.